fix(cli): Keep CDP MCP env reads at serve boundaries

packages/cli/src/serve/acp-http/index.ts

@@ -102,7 +102,7 @@ function buildChromeDevToolsMcpRuntimeConfig(
   ) {
     return undefined;
   }
-  const command = resolveCdpMcpCommand();
+  const command = resolveCdpMcpCommand(process.env);
   if (!command) {
     writeStderrLine(
       `qwen serve: set ${QWEN_CDP_MCP_COMMAND_ENV} to enable browser automation MCP (no adapter is bundled)`,

packages/cli/src/serve/cdp-mcp-command.ts

@@ -6,22 +6,26 @@
 
 /** Stdio MCP adapter command used by the optional CDP browser automation bridge. */
 export const QWEN_CDP_MCP_COMMAND_ENV = 'QWEN_CDP_MCP_COMMAND';
+const QWEN_SERVE_ACP_HTTP_ENV = 'QWEN_SERVE_ACP_HTTP';
 
 export function resolveCdpMcpCommand(
-  env: NodeJS.ProcessEnv = process.env,
+  env: Readonly<NodeJS.ProcessEnv>,
 ): string | undefined {
   const command = env[QWEN_CDP_MCP_COMMAND_ENV]?.trim();
   return command ? command : undefined;
 }
 
-export function isBrowserAutomationMcpAvailable(opts: {
-  cdpTunnelOverWs?: boolean;
-  token?: string;
-}): boolean {
+export function isBrowserAutomationMcpAvailable(
+  opts: {
+    cdpTunnelOverWs?: boolean;
+    token?: string;
+  },
+  env: Readonly<NodeJS.ProcessEnv>,
+): boolean {
   return (
     opts.cdpTunnelOverWs === true &&
     !opts.token &&
-    process.env['QWEN_SERVE_ACP_HTTP'] !== '0' &&
-    resolveCdpMcpCommand() !== undefined
+    env[QWEN_SERVE_ACP_HTTP_ENV] !== '0' &&
+    resolveCdpMcpCommand(env) !== undefined
   );
 }

packages/cli/src/serve/run-qwen-serve.test.ts

@@ -1516,10 +1516,13 @@ describe('runQwenServe runtime startup failures', () => {
 
   it('does not enable browser automation MCP on bearer-protected endpoints', () => {
     expect(
-      isBrowserAutomationMcpAvailable({
-        cdpTunnelOverWs: true,
-        token: 'secret-token',
-      }),
+      isBrowserAutomationMcpAvailable(
+        {
+          cdpTunnelOverWs: true,
+          token: 'secret-token',
+        },
+        process.env,
+      ),
     ).toBe(false);
   });
 

packages/cli/src/serve/run-qwen-serve.ts

@@ -854,7 +854,10 @@ function currentServeFeaturesForRunQwenServe(
     // so the bootstrap `/capabilities` window doesn't briefly under-report them.
     clientMcpOverWsEnabled: opts.clientMcpOverWs === true,
     cdpTunnelOverWsEnabled: opts.cdpTunnelOverWs === true,
-    browserAutomationMcpAvailable: isBrowserAutomationMcpAvailable(opts),
+    browserAutomationMcpAvailable: isBrowserAutomationMcpAvailable(
+      opts,
+      process.env,
+    ),
   });
 }
 

packages/cli/src/serve/server/serve-features.ts

@@ -95,7 +95,10 @@ export function createServeFeatures(
         multiWorkspaceSessionsEnabled,
         clientMcpOverWsEnabled: opts.clientMcpOverWs === true,
         cdpTunnelOverWsEnabled: opts.cdpTunnelOverWs === true,
-        browserAutomationMcpAvailable: isBrowserAutomationMcpAvailable(opts),
+        browserAutomationMcpAvailable: isBrowserAutomationMcpAvailable(
+          opts,
+          process.env,
+        ),
         voiceTranscriptionAvailable: getCachedVoiceTranscriptionAvailable(),
         // Advertised whenever the `/voice/stream` WS endpoint exists (ACP HTTP
         // on). A configured token no longer suppresses it — the browser carries